Hilary Duff Talks Motherhood, Changing Diapers

New mom Hilary Duff says one of her favorite parenting duties is something not everyone would expect.

"I love changing diapers!" the singer and actress, 24, told PEOPLE at Friday's Bing and DoSomething.org's Summer of Doing kick-off event downtown at the Heart of Los Angeles. "I'm really good at it. I've got it down."